walters



' 2 Sheets-Sheet 1.

(No Model;)

J. w, WALTERS. TUBULAR EXPANSION BOILER.

Patented Ndv; 1,1887.-

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(No Model.) 2 Sheets-Sheet L2.

J. W. WALTERS.

TUBULAR EXPANSION BOILER.

.No. 372,346, -I7;L7-.3.Patented Nov. 1,1887.

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ilsirrnn STATES PATENT @rrrcs.

JULIUS WM. WALTERS, OF PORT RICHMOND, NEW YORK.

TUBULAR EXPANSION-BOILER.

SPECIFICATION forming part of Letters Patent No. 372,346, dated November1 1887.

Application filed August 14, 1886. Renewed April 6, 1887. Serial No.233,921. (No model.)

To all whom, it may concern.-

Be it known that I, J ULIUs WILLIAM WVAL- TERs, of Port Richmond,Richmond county, State of New York, have invented a new and usefulImprovement in Tubular Expansion- Boilers; and I do hereby declare thatthe following is a full and exact description thereof, reference beingbad to the accompanying drawings, and to the letters ofreference markedthereon, making a part of this specification, in which Figure 1 is avertical central section of my improved steam-boiler in line w x of Fig.2. Fig. 2 is a transverse section in lineyy of Fig. 1; Fig. 3, a centralvertical sectionillustrat-ing a modification in the construction of theboiler, and Fig. 4 a transverse section in line z z of Fig. 3.

My invention relates to the construction of tubular expansion-boilers,and has for its .object to simplify the same and greatly increase theheating-surface within agiven compass, so as to obtain a more compact,efficient, and economical steam-generator than those now in use, andwhich shall be especially adapted for use in steanryaehts.

It consists in the combination,with two hollow spheroidal heads unit-edby a singlestraight watertube, of a series of curved openended tubes,ofgradnated lengths,seeured at each endtosaidheadsinconcentricrows,andinmounting the heads and tubes over thefurnace upon one or more tubular supports connecting thelower head witha hollow base placed below thefurnace-grate bars, the upper head beingclosed to constitute a steam dome or chamber; also, in combining withthe upper head deflectingfianges fitted within the same, in front of theends of the tubes, to promote a circulation of the water in the boilerand prevent it from passing up with the steam into the dome orsteam-chamber.

In the accompanying drawings, A A, Fig. 1, represent two spheroidalheads, preferably made of steel and joined togetherby a single straightcommunicating tube, 13, made fast by upsetting each open end of the tubein a suitable aperture pierced through the smaller end of each head. i Auniform series of smaller apertures are pierced concentrically in thewall of each head in close proximity to each other, and the counterpartapertures in the upper and lower heads are connected by a tube, 0, whoseopen ends are upset in thecustomary manner to form a close steam-tightjoint with the wall of each head by means of a suitable upsetting toolor punch introduced through the open end of the head. In this manner thetwo spheroidal heads A A are connected, not only by the central straighttube, B, but by a multitude'of small curved tubes, (1 G C, arranged inconcentric rows, and which, increasing in length from the inner to theouter row, likewise increase in curvature, so that the outermost tubespresent, in connection with the hcadsto which they are connected at topand bottom, as described, a spherical form, as illustrated in Figs. 1,3, and 4, while a free unrestricted circulation for the hot airandinflammable gases from the furnace is afforded around each tube alongits entire length.

The upperend of the spherical multitubular boiler thus constructed isclosed by a suitable cap or cover, D, which may be either flanged orfirmly bolted upon the open end of the upper head, as shown in Fig. 1,or screwed down thereon, as shown in Fig; 3, or otherwise made fast witha secure steam-joint in any well-known manner, and to which asteamdelivery pipe, E, (see Fig. 3,) is fitted as usual.

By preference,an inwardly-projecti ng flange, F, inwardly curved andcontracted at its lower end, is formed and fitted to the inner face ofthe covering-plate D of the upper head. The office of this flange is todeflect and throw back any particles of water carried up with the steamthrough the tubesO O, leaving the steam to pass up dry into thesteamdome or chamber through the contracted opening formed by the flange. Asecond conical deflecting-plate, F, may, if required, be also insertedwithin the circular deflectingllange F, as illustrated in Fig. 1.

The lower end of the boiler may be closed by means of a plug, G, Fig. 1,screwing into the opening in the lower spheroidal head, A, and be fittedwith two or more tubular curved water-legs, H H, fitted with a tightjoint to said lower head, and extending thence to a mud-drum orwater-chamber of any suitable form fixed under the ash-pit V. Bypreference, this lower water-chamber or mud-drum may be constructed ofpipes K K, of suitable lengths, coupled by elbows L L (see Fig. 2) toform a continuous rectangular reservoir, to which the lower ends of thecurved water-legs H H are fitted, as shown in Fig. 1. This rectangularmud-drum or water-chamber is fitted with a blow-off cock, M, and awater-supply pipe, N. Instead, however, of supporting the boiler uponthe curved water-legs H H and the tubular base or mud-drum K L, Icontemplate mountingit upon a single central straight hollow tube orwater-leg, P, projecting upward from the crown of a mud drum or chamber,R, having a wide base, to which thejwatersupply pipe N and blowoff pipeand cock M are fitted.

The spherical multitubular boiler is completed for use byinclosing it.within a suitable outer furnace wall or casing, S, in which afire-chamber is formed immediately beneath the lower head, A, itsgrate-bars being sup ported above the mud drum or water-chant her, towhich the supporting water leg or legs are connected, so that themud-drum shall lie under or within the ash-box. The upper end of thefurnace is connected with a smoke-stack, W, and the hot air and gasesand all products of combustionin the tire-chamber pass directly up,over, between, and around each ofthe sev eral boilenflues G G and theirconnected heads A A, so as to subject them to the immediate action ofthe firein the most effective manner, while the peculiar arrangement ofthe fines insures an active constant circulation of water therein, allsediment being quickly deposited in and delivered through the water-legsto the mud-drum at the base.

An auxiliary supply of hot air is admitted to the furnace through an airspace or flue, 0, formed around the inner wall of the furnace, to extendfrom top to bottom thereof, the upper end of said air-space being madeto communicate with the outer air and thelower end thereof with openingsinto the fire-chamber near the lower end of the boiler; but as this andsimilar devices forincrcasing the intensity of the heat and perfectingthe combustion of the gases in the furnace are in common use, they neednot herein be more fully described.

In the use and operation of this multitubular spherical boiler, thewater-legs, lower head, and curved connecting-tubes are filled withwater to about one halt the height of the tubes, and the supply ismaintained from the supply-pipe N in the customary manner. A fire beingkindled on the grate-bars, the hot air, flames, and gases will flow uparound the tubes and heads of the boiler,with the effect of readily andcontinuously generating steam to be delivered into the upper head orsteamdome, the water carried upward with the steam being arrested andturned back by the deflecting plates and flanges F F, against which thesteam impinges as it leaves the tube 0 G.

The sediment from the watcr,settling to the bottom of the water-legs,isreadily blown out by opening the blow-cock M.

The curved form and arrangement of the tubes C C permit of an equalextension and contraction of the boiler without any strain uponthejoints to loosen them.

I claim as my invention- 1. Theco1nbination,inamultitubular boiler, ofthe spheroidal heads and the concentric series of curved arched tubes ofdifferent lengths connecting them, substantially in the manner and forthe purpose herein set fort h.

Theeombination, in a multitubular boiler. of two spheroidal heads, aseries of arched tubes of different lengths connecting them,one or morewater-legs entering the lower head, and a mud-drum with which thewater-legs are made to communicate, all substantially in the manner andfor the purpose herein set forth.

3. The combination, with the spheroidal heads and the series of curvedtubes connecting them, of an inwardIy-contraeted circulardeflecting-flange fitted within the upper head to extend in front of theopenings in the tube, substantially in the manner and for the purposeherein set forth.

4. The combination, with the spheroidal heads connected by a series ofarched tubes opening into each, a mud-drum or water-supply chamber, andone or more water-legs connecting the lower head with said dome orchamber, of a furnace wall or casing inclosing said tubes and heads, andthe water leg or legs connected therewith, and a lirechamber and ash-pitformed beneath the lower head and above thedrum or water-supply chamber,whereby the heat and products of combustion are carried from the furnaceup, over, and between the two heads and the several archedconnecting-tubes, all substantially in the manner and for the purposeherein set forth.

In testimony whereof Ihavesigned my name to this specification in thepresence of two subscribing wit ncsses.

JULIUS \VM. \VALTERS.

Vitncsscs:

A. N. J ESBERA, S. A. STAVERS.

